Extreme halophilic, hyperthermophile, or and histone-containing taxon of domain Archaea.

Among known Euryarchaeota and indeed archaea generally, the methanogens are particularly .

Class , order , family , and the following genera:

Class , order , family :

• Numerous genera

Class , order , family , and the following genera:

Class , order , family , genus .

Class , order , family , and the following genera:

Class , order , and the following:

• Genus
• Genus
• Family , genus
• Family , genus

Class , order , and family , and the following genera:

Class , order , family , genus .

Class .

Class , order , family , and the following genera:

Class , order , family , and the following genera:

Class , order , family , genus .

Class , order , family , genus .

Contrast Euryarchaeota with Crenarchaeota.